Volt-Amperes to Milliwatts Converter
Enter the power in volt-amperes below to convert it to milliwatts.
Convert Volt-Amperes to Milliwatts
Enter a value in volt-amperes (VA) to convert to milliwatts (mW).
Volt-Ampere to Milliwatt Conversion Table
Table showing various volt-ampere measurements converted to milliwatts. Click any preset value or arrow to load it into the converter.
How to Convert Volt-Amperes to Milliwatts
To convert volt-amperes to milliwatts, multiply the power by the following conversion ratio: 1,000 milliwatts/volt-ampere.
Since one volt-ampere is equal to 1,000 milliwatts, you can use this simple formula to convert:
The power in milliwatts is equal to the power in volt-amperes multiplied by 1,000.
For example, here's how to convert 5 volt-amperes to milliwatts using the formula above.
How Many Milliwatts Are in a Volt-Ampere?
There are 1,000 milliwatts in a volt-ampere, which is why we use this value in the formula above.
Our volt-ampere to milliwatt calculator automatically converts your power measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Volt-Amperes and milliwatts are both units used to measure power. Keep reading to learn more about each unit.
What Is a Volt-Ampere?
A volt-ampere is a unit of power equal to 1 watts (W), the base unit for power. Apparent electrical power unit (equivalent to 1 W at unity power factor). [1]
The volt-ampere is classified as an International System of Units (SI) unit of power. Volt-Amperes can be abbreviated as VA; for example, 1 volt-ampere can be written as 1 VA.
When working with volt-amperes (VA) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, volt-amperes (VA) are widely used across standard power applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Milliwatt?
A milliwatt is a unit of power equal to 1/1,000 of a watt (0.001 W). One-thousandth of a Watt. [2]
The milliwatt is classified as a metric and SI-compatible unit of power. Milliwatts can be abbreviated as mW; for example, 1 milliwatt can be written as 1 mW.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliwatt (mW) a convenient decimal multiple of the watt (W).
In practice, milliwatts (mW) are widely used across fine-tolerance laboratory, analytical, and micro-scale power measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting power between volt-amperes (VA) and milliwatts (mW), keep full floating-point precision (1 VA = 1,000 mW; 1 mW = 0.001 VA) during intermediate calculations and round only the final milliwatt figure to match your instrument tolerance.
More Volt-Ampere & Milliwatt Conversions
Need to calculate in the opposite direction? Use our milliwatts to volt-amperes calculator to switch your starting unit immediately. You can also explore related tools such as converting milliwatts to volt-amperes, converting watts to horsepower (hp), or converting horsepower (hp) to watts.
Convert from Volt-Amperes
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Power & Radiant Flux))·Power Metrology Standard — Volt-Amperes (VA) to Milliwatts (mW)
- [2]NIST CUU SpecificationNIST CUU (Derived SI Unit: Watt (W))·Unit Specifications: Volt-Ampere (VA) (VA) & Milliwatt (mW)
- [3]BIPM ReferenceBIPM (SI Brochure (9th Ed.) — Power)·Conversion Factors & Mathematical Basis (VA to mW)